Elon Musk, the world's richest man and a close ally of President Donald Trump, has faced widespread accusations of making a Nazi gesture twice during a speech to a crowd of Trump supporters gathered at Washington's Capital One Arena for an indoor "Presidential Parade" on Monday, shortly after Trump's second inauguration.

An activist group projected a photo of billionaire Elon Musk making a controversial gesture that resembled a Roman salute on a Tesla factory near Berlin this week, with a single word above the world’s richest man: “Heil.

The British campaign group "Led By Donkeys" has claimed responsibility for the stunt that authorities say may have breached German laws on the use of symbols linked to illegal organizations.